fio is an I/O tool meant to be used both for benchmark and stress/hardware verification. It has support for 19 different types of I/O engines (sync, mmap, libaio, posixaio, SG v3, splice, null, network, syslet, guasi, solarisaio, and more), I/O priorities (for newer Linux kernels), rate I/O, forked or threaded jobs, and much more. It can work on block devices as well as files. fio accepts job descriptions in a simple-to-understand text format. Several example job files are included. fio displays all sorts of I/O performance information, including complete IO latencies and percentiles. Fio is in wide use in many places, for both benchmarking, QA, and verification purposes. It supports Linux, FreeBSD, NetBSD, OpenBSD, OS X, OpenSolaris, AIX, HP-UX, Android, and Windows.

GNU Parted is a package for creating, destroying,
resizing, checking, and copying partitions and the
file systems on them. This is useful for creating
space for new operating systems, reorganizing disk
usage, copying data between hard disks, and disk
imaging. It contains a library, libparted, and a
command-line frontend, parted, which also serves
as a sample implementation and script backend.

GNUnet is a peer-to-peer framework with focus on providing security. All peer-to-peer messages in the network are confidential and authenticated. The framework provides a transport abstraction layer and can currently encapsulate the network traffic in UDP, TCP, HTTP, HTTPS, or direct 802.11 (WLAN). GNUnet supports accounting to provide contributing nodes with better service. The services built on top of the framework include anonymous file sharing and a virtual network providing IPv4-IPv6 transition via protocol translation over the P2P network.

ISO Master is an easy to use GUI CD image editor for Linux, BSD, and Windows. Basically, you can use this program to extract files from an ISO, add files to an ISO, and create bootable ISOs, all in a graphical user interface. It can open both ISO and NRG files, but can only save as ISO. It is based on bkisofs, a library for reading, modifying, and writing ISO images.

mkisofs is used for premastering iso9660 filesystems which are used on CDROMs. The output of mkisofs can then be sent to a CDROM writer with a utility such as cdrecord. It has support for many formats, including Rock Ridge, Joliet, and Apple HFS (beta).

libdvdread provides a simple foundation for
reading DVD video disks. It provides the
functionality that is required to access many
DVDs. It parses IFO files, reads NAV-blocks, and
performs CSS authentication and descrambling.

emelFM2 is a file manager that implements the popular two-pane design. It features a simple GTK interface, a flexible file typing scheme, and a built-in command line for executing commands without opening an xterm.

cryptmount is a utility for creating and managing secure filing systems on GNU/Linux systems. After initial setup, it allows any user to mount or unmount filesystems on demand, solely by providing the decryption password, with any system devices needed to access the filing system being configured automatically. A wide variety of encryption schemes (provided by the kernel dm-crypt system and the libgcrypt library) can be used to protect both the filesystem and the access key. The protected filing systems can reside in either ordinary files or disk partitions. The package also supports encrypted swap partitions, and automatic configuration on system boot-up.

SystemRescueCd is a Linux system available from a bootable CDROM
that provides an easy way to perform administrative tasks on your
computer, such as creating and editing the partitions of the hard disk
or backing up data. It contains a lot of system utilities (such as
parted, partimage, and fstools), and basic programs (such as editors,
midnight commander, and network tools). It also includes GParted, a
Partition Magic clone that makes editing partitions easy with its
graphical user interface. This CDROM aims to be very easy to use and
accessible to everybody, and it also provides advanced personalization
features.

INSERT (the Inside Security Rescue Toolkit) aims
to be a multi-functional, multi-purpose disaster
recovery and network analysis system. It boots
from a credit card-sized CD-ROM and is basically a
stripped-down version of Knoppix. It features good
hardware detection, fluxbox, emelfm, links-hacked,
ssh, tcpdump, nmap, chntpwd, and much more. It
provides full read-write support for NTFS
partitions (using ntfs-3g), and the ClamAV virus
scanner (including a fairly recent signature
database and a GUI). It provides partition
handling with gParted and also has a network boot
facility.